A386100 Primes having only {1, 2, 6, 8} as digits.

2, 11, 61, 181, 211, 281, 661, 811, 821, 881, 1181, 1621, 1811, 1861, 2111, 2161, 2221, 2281, 2621, 2861, 6121, 6211, 6221, 6661, 8111, 8161, 8221, 8681, 8821, 8861, 11161, 11261, 11621, 11681, 11821, 12161, 12211, 12281, 12611, 12821, 16111, 16661, 16811, 18121

Offset: 1

Author

Jason Bard, Jul 17 2025

Keywords

• nonn
• base
• easy

Links

• Jason Bard, Table of n, a(n) for n = 1..10000
• Index to entries for primes with digits in a given set

Crossrefs

Supersequence of A385774, A385775, A385782.

Cf. A000040, A030430, A385776.

Programs

Magma

[p: p in PrimesUpTo(10^6) | Set(Intseq(p)) subset [1, 2, 6, 8]];

Mathematica

Flatten[Table[Select[FromDigits /@ Tuples[{1, 2, 6, 8}, n], PrimeQ], {n, 7}]]

PARI

primes_with(, 1, [1, 2, 6, 8]) \\ uses function in A385776

Python

print(list(islice(primes_with("1268"), 41))) # uses function/imports in A385776